Door-latch.



No. 659,633. Patented Oct. 9, I900. H. LDMAX & J. TDMLINSON.

DOOR LATCH.

(Application filed Aug. 12, 1899.)

0m 0096 99 j Q II'IBTHAIKJO 11, 877776;? Attorney 4 3 I h e -Invenfov's en L with an inclined striking edge 0 FIQEEQ HENRY LOMAX AND JOHN TOMLINSON, CF DARXVEN, ENGLAND.

DOUR LATCl-i.

SPECIFIOATEON forming part of Letters Patent No. 659,633, dated. October 9, 1900. Application filed August 12,1899. Serial ire/227,002. on model.)

To all whom it ntay concern.-

Be it known that we, HENRY LOMAX and Joan ToMLiNsoN, subjects of the Queen of Great Britain, residing at Darwen, in the county of Lancaster, England, have invented certain new and useful Improvements in Door-Latches, (application for patent having been filed in Great Britain on February 13, 189.), and numbered 3,145,) of which the following is a specification.

This invention relates to latches for doors and the like; and it consists in an improved construct-ion andcoinbination of the parts thereof, the object of the improvements being chiefly to secure the latch its closing position in a simple and'inexpensive manner obtain a more secure fastening of the door or the like,

On thedrawings annexed hereunto, Figure 3. shows an elevation of the latch in its opened position, and 2 a similar view of the closed latch; Fig. 3, an end viewof the catch and latch, Fig. 4 a plan of 2. Fig. 5 is a View, on an enlarged scale, oi the spindle shown more or less in most of the figures.

The latch-bolt or hingebolt hereinafter called the bolt, is hinged eta to the door I), as usual, and at the other free end is preferably formed h an inclined striking-face a which he closing of the door comes into contact with the catch c,-fixed to the door-frame c, which catch, usual, is formed \rVhen closing the door, the incline e strikes against the edge and the bolt is easily lifted.

Instead of a thumb-plate for lifting the latch-bolt we employ a spindle (1, having a knob e fixed upon the spindle (Z on the outside of the door, the latch being, as is customary and for obvious reasons, fixed upon the inside of the door. On the inside of the door a barf fixed upon the indie for the purpose 0 i bolt,and is hcreini-iftcr called the l This lifter preferably tapped and screwed upon thcend ofthespindle d, which is roundinthc part passing through the door. The end of the spindle (i is made square and screw thrcaded to receive the lifterf. in view of the smallness of the scale of Figs. 1, 2, and e this construction is not clear, butwill become apparent by reference to Fig. 5, which shows the spindle with the squared end, which end is threaded, whereby the threads occur on the corners of a foursided spindle, The lifter f is of channelsection or with a projecting flange f. the bottom, upon which a locking-link e' is hinged at 6 When this ispulled outward, the

spindle (Z can be turned by means ofthc knob eand the knob e and liftcrf drawn together as close to the door 0 as may be desired, and then by turnini, the locking-link 6. back into the position shown on the drawings the spindle d and lifterfare locked together, so that the bolta is lifted when the knob e is turned. On the inside the bolt can be lifted by means of the knob g, fixed thereto.

For the purpose of locking the latch from the inside of the door we make the latchguai'd h act as a locking device for preventing the bolt to from lifting. This we do by pivoting the latch-guard it upon a screw 71,

at the top and governing its movement by means of a slot 72, in the lower end, through which, a headed pin or screw h" passes into the door or a fixture thereto. A notch h" is formed in the side of the latch-guard, which notch engages with a pin it", fixed in the bolt (1, when the latch-guard I1. is shifted sidewise into the position shown on Fig. 2, while the bolt is engaged in the catch 0. For the purpose of reducing the friction of the bolt on the guard when the door is pulled toa covered recess it may be formed on the guard, containing a ball or its equivalent bearing against the end of the recess and the latcliboli.

In order to further secure the door, a projcction c is preferably formed on the inside face of the catch 0, behind which tlieilatchguard 71. slips when pushed sidewise to lock the bolt 0,, the guard-plate thus acting as another latch-bolt aud thc door. being doubly secured. i

\Vhat we claim as our invention is 1. The combination with a hinged latch 1o 3. The combination with a hinged latchbolt and a catch for the same, ofaspindle capable ofturningin'the door, having a knob fixed to one end and screw-threaded at its other end, said latter end being formed with [5 fiat sides, a tapped oblong lifter flanged at one side and screwed upon said spindle, and

aswivel-bar pivoted on the flange of the lifter,

and'fitting between the same and one of the flat sides on said spindle.

4. The'combination with a hinged latchbolt and a catch for the same,ot' a spindle which is capable of turning in the door, and

has a knob fixed to one end and is screw threaded at its other end, said latter end heing formed wiih flat sides, a tapped oblong -1i fter flanged at one side'and screwed upon said spindle, a swivel-bar pivoted on the fiange' of the lifter and fitting between the same and one of the flat sideslon said spindle,

a latch-guard pivoted at one dndflaflin fi,xed in'the free end of said latch-bolt, and a notch iii the edge of said latch-guard engaging'with the pin when the free end of'the guard is pushed sidewise while the bolt is engaged in the catch. r i

5. 1 he combination of a hinged latch-halt having an inclined striking-face at its free end a catch for the same with an inclined striking edge, a latch-guard pivoted at one end and formed with a recess opposite to the 40 latch-bolt, a ball inserted into said recess, a I

pin in the free end of the latch-bolt anda. notch in the edge of the latch-guard engaging therewith when the free end of the latchguard is pushed sidewise while the bolt is en- 5 gaged in the catch, a lateral projection on said catch behind which the latch-guard fits when pushed as aforesaid, a spindle. capable of turning in the door having a knob fixed to one end and a tapped oblong lifter screwed upon the other end, a flange on said lifter anda swivel-bar pivoted thereon, and flat sides on the end of the spindle fittingon said swivelbar when it rests upon the flange of the lifter. 6.- The combination with a hinged latcln bolt and a catch'for the same,vof a swinging latch-guard pivoted at one end and havinga notch inits edge, means for holding the other end stationaqy withingpredetermined limits, and spin fixed, in'tliefree end of said bolt anthatlapted to become engaged in the said notch when the'fi'ee en dot the gun rd is pushed sidewise while the bolt is engaged in the catch. In testimony whereof we have hereunto set our hands in the presence of two witnesses. 6

' HENRY LOMAX. JOHN TOMLINSON. Witnesses:

CARL BoLLn, R. J. URQUHART. 

